1 /* gethostname emulation for SysV and POSIX.1.
2 Copyright (C) 1992, 2003 Free Software Foundation, Inc.
3
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
7 any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
13
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software Foundation,
16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
17 #include <sys/cdefs.h>
18 __RCSID("$NetBSD: gethostname.c,v 1.2 2016/05/17 14:00:09 christos Exp $");
19
20
21 /* David MacKenzie <djm@gnu.ai.mit.edu> */
22
23 #ifdef HAVE_CONFIG_H
24 # include <config.h>
25 #endif
26
27 #ifdef HAVE_UNAME
28 # include <sys/utsname.h>
29 #endif
30
31 /* Put up to LEN chars of the host name into NAME.
32 Null terminate it if the name is shorter than LEN.
33 Return 0 if ok, -1 if error. */
34
35 #include <stddef.h>
36
37 int
gethostname(char * name,size_t len)38 gethostname (char *name, size_t len)
39 {
40 #ifdef HAVE_UNAME
41 struct utsname uts;
42
43 if (uname (&uts) == -1)
44 return -1;
45 if (len > sizeof (uts.nodename))
46 {
47 /* More space than we need is available. */
48 name[sizeof (uts.nodename)] = '\0';
49 len = sizeof (uts.nodename);
50 }
51 strncpy (name, uts.nodename, len);
52 #else
53 strcpy (name, ""); /* Hardcode your system name if you want. */
54 #endif
55 return 0;
56 }
57